Lasting-jack



0. MARTIN. LASTING JACK.

(No Model.)

3 Patented June 17, 1890.

UNITED STATES. PATENT OFFICE.

ONESIME MARTIN, OF MARLBOROUGH, MASSACHUSETTS.

LASTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 430,233, dated June 17, 1890.

Application filed January 20, 1890- Serial No. 337,472. (No model.)

To all whom it may concern.-

Be it known that I, ONESIME MARTIN, of Marlborough, in the county of Middlesex, State of Massachusetts, have invented cer tain new and useful Improvements in Lasting-Jacks, of which the following is a descrip tion sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation, partly in section, of my improved jack; Fig. 2, a front elevation of the same, and Fig. 3 a top plan view.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

My invention relates to lasting-jacks provided with an adjustable toe-piece; and it consists in certain novel features hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more effective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation In the drawings, A represents the bench, and B the body of the jack.

The body B consists of a cylinder or tube, which is projected through a suitable opening in the bench and provided at its upper end with a horizontal supporting-flange b. This flange-is provided with screw-holes d for receiving screws to secure it to the bench, and slots f, through which the ordinary treadlestrap passes. The lower end of the body B is interiorly screw-threaded to receive a threaded plug g. A stiff coiled spring 71-, disposed within the body, rests upon the plug g and bears on its upper end a cam-block 1', provided with a boss or tooth m, which projects slightly above the mouth j of said body. An ear is projects vertically from the flange b at each side of the cam i.

A standard D is provided on its lower end with a segment p, pivoted between the ears k, and provided with grooves or indentations q r, in which the tooth m on the cam-block z' j on its pivot.

takes. A shouldert on the standard engages the top of the ears and prevents forward movement of said standard when in a vertical position, as shown in the drawings, at which time the cam-tooth m projects into the groove 0.

A horizontal bar 0 is secured to the top of the standard D by a bolt o and washer w. The rear end of the bar 0 is turned vertically upward at 00, and a heel-piece y, provided with a last-spindle z, is pivoted in said portion. A vertical tubular opening is formed in the bar 0 between the heel-piece and standard, and in said opening a coiled spring 16 is secured by its lower end. The upper end of said spring is secured within a cap 17, projecting from the heel-piece over said opening. The spring 17 acts contractively to restrain rearward movement of the heel-piece In front of the standard D a horizontal flange or way 20 is formed on each side of the bar 0, and vertical openings 21 are formed in this portion of said bar, said openings being at determined distances from the heel-piece representing different sizes of lasts.

The toe-piece H has a head 22 of the ordinary form, and its lower end is grooved at 23 to receive the upper portion of the bar 0.

A spindle 24 (shown by dotted lines in Fig. 2) projects vertically downward in the groove 23 and is fitted to enter the openings 21 in the bar.

Pivoted in ears 25 at each side of the groove 23 there is acatch or hook 26, which takes under the bar-flanges 20 and prevents accidental vertical movement of the toe-piece. A coiled spring 29 on the pivot of each catch acts torsionally to hold it in engagement with the flanges.

In the use of my improvement the thumbpieces 30 of the catches are depressed, freeing their hooks 31 from the flanges 20. The toepiece may then be released from the bar 0 and its spindle 24 adjusted in an opening 21 thereof suitable for the size of shoe to be lasted. The last is then adjusted on the spindle z of the heel-piece. Said spindle is inclined slightly toward the toe-piece, and to adjust the toe of the last thereon the heelpiece is swung backward slightly on its pivot against the force of the spring 16 until the last-toe can be passed over onto the head 22 of said toe-piece, against which said spring tends to hold it. The treadle-strap is adjusted and the shoe lasted in the ordinary manner. By means of the pivoted standard D the shoe may be tipped rearwardly toward the operator when desired. The toothmof the spring cam-block enters the groove (1 of the segment and holds said standard when so tilted. A series of these grooves may be formed in the segment, if desired. A stop or shoulder at the rear of the ears it engages the standard and prevents it from being swung too far backward. The bar 0 may be arranged to rotate on the bolt 1:, if desired.

Having thus explained my invention,what I claim is 1. In a lasting-jack, a hollow body provided with a spring-cushioned cam-block, combined with a standard bearing the toe and heel pleces and pivoted on said body by a grooved segment in engagement with said cam, substantially as and for the purpose set forth.

2. In a lasting-jack, the combination of a hollow body, a cam-retained standard pivoted thereon, a horizontal bar on said standard, a spring-retained heel-piece pivoted in one end of said bar, and a detachable toe-piece provided with a spindle fitted to enter a serles of openings in the opposite end of said bar, substantially as described.

3. In a lasting-jack,abody,a standard pivoted thereto, a horizontal bar on said standard provided with a series of vertical spindleopenings in one section, a heel-piece pivoted to the opposite section, a tension-spring for said heel, a detachable toe-piece having a spindle fitted to enter said openings, and spring-catches for. preventing vertical movement thereof, substantially as and for the purpose set forth.

4. In a lasting-jack, the combination of a hollow body, a spring-cushioned cam therein, a pivoted standard having a notched segment engaging said earn, a bar on the standard provided with a pivoted heel-piece, a tensionspring therefor, a detachable toe-piece having a spindle adapted to beinserted in a series of openings in said bar, and spring-catches for said toe-piece, substantially as described.

5. In a lasting-jack, the body B, provided with the spring-cam t', in combination with the standard 'D, having segment 10, and a horizontal bar on said standard bearing a pivoted heel-piece and adjustable toe-piece, substantially as described.

6. In a lasting-jack, the bar 0, pivoted on the jack-body and provided with the pivoted heel-piece y, having the cap 17, in combination with the spring 16, secured in said bar and cap, and a toe-piece adjustable on said bar, substantially as described.

7. In a lasting-jack, the bar 0, provided with the flanges 20 and openings 21, in combination with the toe-piece H, having the spindle 2t and spring-catches 26, and a heelpiece pivoted to said bar, substantially as described.

ONESIME MARTIN.

Witnesses:

FRANK SIMARD, LoUIs COTE. 

